Opencascade 判断TopoDS_Edge

void judgeTopoEdgeType(const TopoDS_Edge& topoedge){
    double first = 0.0;
    double last = 0.0;
    Handle(Geom_Curve) handleGeomCurve = BRep_Tool::Curve(topoedge,first,last);
    if(handleGeomCurve .IsNull()){
        return;
    }
    if(handleGeomCurve->IsKind(STANDARD_TYPE(Geom_Line))){
        std::cout << "Type is Geom_Line" << std::endl;
    }
    else if(handleGeomCurve->IsKind(STANDARD_TYPE(Geom_Circle))){
        std::cout << "Type is Geom_Circle" << std::endl;
    }
}
int main(){
    gp_Pnt pnt1(0,0,0);
    gp_Pnt pnt2(10,0,0);
    BRepBuilderAPI_MakeEdge makeLineEdge(pnt1,pnt2);
    if(makeLineEdge.IsDone()){
        TopoDS_Edge topoEdge = makeLineEdge.Edge();
        judgeTopoEdgeType(topoEdge);
    }

    gp_Circ circle(gp_Ax2(),20);
    BRepBuilderAPI_MakeEdge makeCircleEdge(circle);
    if(makeCircleEdge.IsDone()){
        TopoDS_Edge topoEdge = makeCircleEdge.Edge();
        judgeTopoEdgeType(topoEdge);
    }
}

//结果输出：
//Type is Geom_Line
//Type is Geom_Circle

其他继承Geom_Curve的子类也可判断
TopoDS_Face类型通过BRep_Tool::Surface判断